1 /* $NetBSD: via_module.c,v 1.5 2021/12/19 10:33:00 riastradh Exp $ */
2
3 /*-
4 * Copyright (c) 2015 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Taylor R. Campbell.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: via_module.c,v 1.5 2021/12/19 10:33:00 riastradh Exp $");
34
35 #include <sys/types.h>
36 #include <sys/module.h>
37 #include <sys/once.h>
38
39 #include <drm/drm_device.h>
40 #include <drm/via_drm.h>
41
42 #include "via_drv.h"
43
44 MODULE(MODULE_CLASS_DRIVER, viadrmums, "drmkms,drmkms_pci");
45
46 #ifdef _MODULE
47 #include "ioconf.c"
48 #endif
49
50 extern struct drm_driver *const via_drm_driver; /* XXX */
51
52 static int
viadrm_init(void)53 viadrm_init(void)
54 {
55 int error;
56
57 via_init_command_verifier(); /* idempotent, no unwind needed */
58
59 error = drm_guarantee_initialized();
60 if (error)
61 return error;
62
63 return 0;
64 }
65
66 int viadrm_guarantee_initialized(void); /* XXX */
67 int
viadrm_guarantee_initialized(void)68 viadrm_guarantee_initialized(void)
69 {
70 #ifdef _MODULE
71 return 0;
72 #else
73 static ONCE_DECL(viadrm_init_once);
74
75 return RUN_ONCE(&viadrm_init_once, &viadrm_init);
76 #endif
77 }
78
79 static void
viadrm_fini(void)80 viadrm_fini(void)
81 {
82 }
83
84 static int
viadrmums_modcmd(modcmd_t cmd,void * arg __unused)85 viadrmums_modcmd(modcmd_t cmd, void *arg __unused)
86 {
87 int error;
88
89 switch (cmd) {
90 case MODULE_CMD_INIT:
91 #ifdef _MODULE
92 error = viadrm_init();
93 #else
94 error = viadrm_guarantee_initialized();
95 #endif
96 if (error) {
97 aprint_error("viadrmums: failed to initialize: %d\n",
98 error);
99 return error;
100 }
101 #ifdef _MODULE
102 error = config_init_component(cfdriver_ioconf_viadrmums,
103 cfattach_ioconf_viadrmums, cfdata_ioconf_viadrmums);
104 if (error) {
105 aprint_error("viadrmums: failed to init component"
106 ": %d\n", error);
107 viadrm_fini();
108 return error;
109 }
110 #endif
111 return 0;
112
113 case MODULE_CMD_FINI:
114 #ifdef _MODULE
115 error = config_fini_component(cfdriver_ioconf_viadrmums,
116 cfattach_ioconf_viadrmums, cfdata_ioconf_viadrmums);
117 if (error) {
118 aprint_error("viadrmums: failed to fini component"
119 ": %d\n", error);
120 return error;
121 }
122 #endif
123 viadrm_fini();
124 return 0;
125
126 default:
127 return ENOTTY;
128 }
129 }
130